La Sombrerona

Villains: Professor Exclamation • Lyle/FistPuncher • Rodney Thunderpants • Animus Machina • Van Dyke • Coach Haggerty • La Cebolla • Copy Cat • Ned Slater/Neighslayer • Dr. Eelgood • Kathy/The Dog Napper • Bouncy Castle • X-Terminator • Cyborg Rats • Pi-Rat • The Amplifier • The Nightmarionette • Bob Enfantiberg/Big Baby • Sloppy Joe Monster • E.V.I.L. S.C.H.E.M.E. Robots • The Earworm • Record Scratch • The Imposter • Tobor • Ernie • Belle • Arthouse • Tchotchke Jones • Joe/Micromanager • Helen/Rat Burglar • Crimson Haste • Bob Cashwell/Unknownzy • Pendulum Pete • Inga the Ice Queen • La Sombrerona • Itsy Bitsy • Librarian • Mary Mitosis • The Flake • Clem Clam • The Demo Bros • Footkicker • ACE • Stress Ball Monster • Connie McBurlap • Mordros the Annihilator • Dr. Hawthorne • Mr. Large • Dust Might • Slamonade Stan• Hank Franklin • Carl • Felix Van Schurz • Mud Singer • Bone Decimator • Skull Pulverizer
Former villains: • Lauren/The Destructress • El Luchador • Tina • Gerbil • Eastside Bantam/Christine DePoulet • Charlie/Father Goose • Simon • Julie Jennings/Dr. MedusaSaurus • Bayou Barb
Cameos: Sally • Farmer and Farmer's Wife • Brigette Murphy • Balloony • Heinz Doofenshmirtz • Candace Flynn • Stacy Hirano • Love Händel

Season Two: "Hakuna Ma Kevin/The Great American Telenovela" • "Lair Necessities/Tobor or Not Tobor" • "Evil Upheaval/Ay, Ay, A.I." • "Stress Brawl/I Love Luchie" • "The More The Meteor/My Hammie Vice" • "Last Fred Standing/From Dust Till Dawn" • "I Think Therefore I Slam/Thanks, But No Pranks" • "The Silence of the Tchotchkes/A Car is Born" • "Who's in Charge?/Fools of Engagement" • "The New Adventures of Super Kevin" • "The Search for Super Guy/Lorraine, Rattle, and Roll"

Season One: Almost Almost There • Overload the Grid • Ropa Vieja • Race Against Time • How Much Can You Lift? • Fighting Facial Hair • We Take What We Want • Yuko Cheerleading Warrior Attack Seven • Don't Steal From the Banks • La Cebolla • Pinky Promise • Neighslayer Rap Battle • Dance Battle • Gonna Clean Up the Beach • I Want Your Attention • My Best Friend Bailey's Birthday • Stomps • Get Ready for a Rumble • England But with Dragons • Too Cute to Clobber • Immersion Therapy • Abuelita's Rules • Tiny White Tux • Leave It at That • She's an Only Child • The Power to Annoy • I Got Beef • Third Wheel • Just Another Friday Night • Taco Crunchies • It's a Big Big World • Earworm Jingle • Frank's Discounted Discount Costumes • A Hamster and His Boy • Tearing You Down • How You Feel About Me • Professional League of Wrestling Jingle • Dave • Strawberry Festival • Also He's a Genie • I Think We'll Break For Lunch • We're Working Out • The Lemon's Getting Bigger • Positivity Equals Positiveness • Father Goose Jingles • Don't Do It • You Can't See Me • People Pops • I'm the Bomb • Let's See What You've Got • Fix That Faucet • Out On The Town Together • Mustanchup • I'm in a Hurry • I Can Be Bad • Van Dyke • Fighting Facial Hair Again • Ice Queen • Hora Loca • The Council of Düm • To the Bathroom • Simon Says • Bone to Pick • Kevin's Got a Plan • Creepy Doll Factory • The Ballad of Bayou Barb • Trouble in the Bayou • The Great Pillow War • Give Me Your Voice • Juggling Jack • Mary, Mary • If You Wanna Be President • Big Jen • We're Staking Out • Boglyvanian Force • Key To The City • Thimbles • Gotta Get Away
Season Two: • Don't Sweat It • Fresas de Amor • A Fort Out Here In The Woods • Demo Bros Theme Song • Making Breakfast For My Boy • A Foe We Don't Know • Nice And Normal • I'm in Jail • The GOAT Herder of Goats • Bolgylvanian Pizza • Move Out! • Game Face • Fred vs. Fred • A Dust Mite Might • We Don't Care • That's a Prank • Better Than Being Big • A Car is a Car is a Car in a Chase • Live Wire • Fist Foot Time • Check Me Out • Give Me That Book • Bad Bad Heart